Israa Kamil Hasan, Asmaa Hameed Gambash. The effect of exercises in both high and repetitive interval training methods to develop speed endurance, strength endurance, and the achievement of 400 meters’ hurdles under (18) years old. ms [Internet]. 2023 Mar. 30 [cited 2024 Apr. 28];22(1):0078. Available from: https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1097